feat: complete Phase 1 foundation hardening + three-mode UI design doc

Phase 1a — Gradient Removal:
- Replaced all gradient-button/gradient-card with glass-button/path-option-card
- Removed banned gradient CSS classes

Phase 1b — Security Hardening:
- SecretsManager: AES-256-GCM encryption (core/security)
- electrs_status: credentials from env vars instead of hardcoded
- port_manager: RwLock proper error handling (no unwrap)
- Pinned all 11 :latest manifest images to specific versions
- parmanode converter: pinned inferred image versions

Phase 1c — Code Quality:
- Split rpc.rs (1795 lines) into 6 handler modules (auth, node, container, package, peers)
- Removed sideload code (UI, store, RPC client, 3 doc files)
- Fixed body background flash on logout/refresh
- Replaced 30 TypeScript `any` types with proper types
- Deleted HelloWorld.vue, removed TODO comments
- Added set -euo pipefail to all shell scripts
- Made deploy script verbose with timestamps and elapsed time

Also adds:
- CLAUDE.md project guide
- docs/three-mode-ui-design.md — design spec for Easy/Pro/Chat UI modes
- OnlineStatusPill component

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/src/App.vue

@@ -9,7 +9,7 @@
     <!-- Spotlight command palette (Cmd+K / Ctrl+K) -->
     <SpotlightSearch />
 
-    <!-- CLI popup (Cmd+Shift+` / Ctrl+Shift+`) -->
+    <!-- CLI popup (Cmd+C / Ctrl+C) -->
     <CLIPopup />
 
     <!-- App launcher overlay (iframe popup) -->
@@ -119,8 +119,8 @@ function onKeyDown(e: KeyboardEvent) {
     spotlightStore.toggle()
     return
   }
-  // Cmd+Shift+` / Ctrl+Shift+` or Cmd+Shift+C / Ctrl+Shift+C - CLI popup (modifier required)
-  if ((mod && e.shiftKey && e.key === '`') || (mod && e.shiftKey && (e.key === 'c' || e.key === 'C'))) {
+  // Cmd+C / Ctrl+C - CLI popup (skip when in input so copy still works)
+  if (mod && (e.key === 'c' || e.key === 'C') && !isInput) {
     e.preventDefault()
     cliStore.toggle()
     return